Study of 99Zr at the spherical-deformed border via beta-decay of 99Y
The shape transition in the A$\approx$100 region has been the subject of intense studies lately. The rapid change from the near spherical $^{98}$Zr to the strongly deformed $^{100}$Zr is well described. The nucleus $^{99}Zr$ is located exactly at the spherical-deformed border and is therefore an important key parameter to understand the shape change on this region. With the new developments in lifetimes measurements in combination with the Lohengrin spectrometer, new level lifetimes can be measured. With the newly gained information and state of the art microscopic IBFM calculations, the two different structures (spherical and deformed) in $^{99}$Zr can be verified.
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ESMAYLZADEH Arwin; DUNKEL Felix; GARBE Jan; GERHARD Lisa Marie; JOLIE Jan; KARAYONCHEV Vasil; KIM Yung hee; KNAFLA Lukas; KOESTER Ulli; LEY Mario; REGIS Jean Marc and SCHOMACKER Kerstin. (2020). Study of 99Zr at the spherical-deformed border via beta-decay of 99Y. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.3-01-689
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